Remember when Fringe's Walter Bishop first showed up on our TV screens? How about when Damon Salvatore from The Vampire Diaries made his first snarky comment? Or when Stargate's Dr. Rodney McKay first became loveable?
HBO's hit vampire drama True Blood has added a ton of sci-fi street cred with a recent bit of casting, booking one of the deadliest Terminators of them all for a key role later this year. So who is it?